Antijumping device for form rollers



Aug. 4, 1931. *o. c. R OESEN I 1,316,935

I ANTI-IUMPING DEV ICE FOR FORM RQLLERS Original Filed DEC;- 1. 1928 2 Sheets-Sheet 1 Aug. 4, 1931. o. c. ROESEN ANTIJUMPING DEVICE FOR FORM ROLLERS Original Filed Dec. 1, 1928 2 Sheets-Sheet 2 Patented Aug. 4, 1931 UNITED STATES PATENT OFFICE OSCAR CHARLES ROESEN, OF BROOKLYN, NEW YORK, ASSIGNOR TO WOOD NEWSPAPER MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF VIRGINIA ANTIJ'UMPING DEVICE FOR FORM ROLLERS Application fil ed December 1, 1928, Serial No. 323,106. Renewed January 21, 1.931.

This invention relates to a device for preventing form rollers from jumping when riding over the openings or gaps between plates, thus producing imperfections in the printing and tending to increase wear on the bearings of the form rollers.

Reference is to be had to the accompanying drawings in which Fig. 1 is an end view of a printing plate cylinder with part of the inking mechanism shown and the preferred embodiment of this invention applied thereto;

Fig. 2'is a side view;

Fig. 3 is a sectional view on the line 3-3 of Fig. 2;

Fig. 4 is a sectional view similar to Fig. 3, showing a modified form, and

Fig. 5 is a side view thereof.

On printing presses using stereotype printing plates there are marginal openings or gaps between the plates. When the form rollers ride over them they have a tendency to spring into the gaps and then be forced back out. As this type of machinery is now run at very high speeds, the movement of the form roller out of the gap causes it to jump. This vibrates the roll and tends to produce a wavy appearance in the printing and is very hard on the bearings of the form rollers. This invention is designed to avoid these difficulties.

I have shown the invention as applied to an ordinary form roller 10 which transmits the ink from an ink drum 11 to a plate cylinder 12 having stereotype printing plates 13 thereon. One roller is shown in Fig. 1 as in the act of passing into the gap.

On the frame 15 are mounted brackets 16 which carry the bearings 17 or roller sockets for the journals of the form rollers 10. These sockets are provided with screws 18 which hold them together.

In order to overcome the jumping, I pivotally mount at 20 on each of the brackets 16, a shoe or pad 21 having a concave surface adapted to engage the journal 22 of the form roll on the side toward the printing cylinder. If this pad is pressed against the journal it will hold the same against the opposite or work side of its bearing in the socket. The pad constitutes part of a pivot member which has a projection adapted to be held in place by a screw 23 that can be adjusted to increase the pressure as much as may be desired. This screw is held by a poppet 24 mounted on one of the roller sockets 17 which is stationary. It will be obvious that this screw can be tightened up so as to provide an important resistance to the motion of the form roller into the gap and then prevent the jumping when the roller strikes the advance edge of each plate.

This idea can be carried out in the form shown'in Figs. 4 and 5. In this case a pad 25 is held by a screw 26 against a projection 27 on one of the roller sockets 17 and bears directly against the roller journal on the same side as in the other figures. This can be employed to force the journal against the work side of the socket as in the other case.

' It passes through an opening in one of the halves of the roller socket and has its hearing within thearea of the bearing surface of the journal instead of outside that area as in the form shown in the other three figures. In either case the pressure is brought to bear to force the journal against the work side of its socket, so that there will be little chance for the journal to move bodily toward the plate cylinder, and therefore no appreciable springing of the form roller out. of the gap when it strikes the oncoming edge of the plate.

Although I have illustrated and described only two forms of the invention I am aware of the fact that changes can be made there in by any person skilled in the art without departing from the scope of the invention as expressed in the claims.

Therefore, I do not wish to be limited to the exact forms shown but what I do claim 1. The combination with a plate cylinder, an ink drum, and a form roll for transferring ink from ink drum to the plate cylinder, of means for applying pressure to the journal of the form roll in a direction to- 7 Ward the work side of its socket and holding the journal against that side.

2. The combination with a plate cylinder, an ink drum, and a form roll for transfer ringink from the ink drum to the plate cylinder, of sockets for holding the journals of the. form roll,'and means carried by stationary parts of the machine for applying H pressure to the journals in a direction away 7 from the plate cylinder andholding said journals back.

3. The combination with. a form .roll and the roller sockets therefor, of stationary means for supporting the roller sockets, the;

journal of the form roll having its bear ings in said sockets, and means carried by v said stationary means for applying pressure to the journals of the form roll'in a direction toward the work side thereof and holding the ournals against motion in the opposite directlon.

4. In an inking device for a printing press, the combination with the frame, a

bracket carried thereby, a roller socket mounted on the bracket, a form roll having its journal supported bysaid roller socket, a pad pivotally mounted on said bracket and having a concave surface fitting 011 and bearing on the journal at a point outside the socket and on the side opposite the work side, and an adjusting screw carried by the bracket for adjusting the pad against the journal and holding it there under pressure. I

5. In an inking device for a printing press, the combination with the frame, a bracket carried thereby, roller mounted on the bracket, a form-roll having itsjournal supported by said rollersocket,

a pad pivotally mounted on said bracket and extending into said socket, said pad having a concave surface fitting on the ourn-al on the side opposite the work side within the socket, and means carried by the vbracket for adjusting the pad against the journal and holding it' there under pressure. In testimony whereof I have hereunto afiixed my signature. OSCAR CHARLES ROESEN.

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